| /******************************************************************************* |
| * Copyright (c) 2005, 2010 Andrea Bittau, University College London, and others |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Andrea Bittau - initial API and implementation from the PsychoPath XPath 2.0 |
| * Mukul Gandhi - bug 280798 - PsychoPath support for JDK 1.4 |
| *******************************************************************************/ |
| |
| package org.eclipse.wst.xml.xpath2.processor.internal.function; |
| |
| import java.util.Collection; |
| import java.util.Iterator; |
| |
| import org.eclipse.wst.xml.xpath2.api.Item; |
| import org.eclipse.wst.xml.xpath2.api.ResultBuffer; |
| import org.eclipse.wst.xml.xpath2.api.ResultSequence; |
| import org.eclipse.wst.xml.xpath2.processor.DynamicError; |
| import org.eclipse.wst.xml.xpath2.processor.internal.types.AnyAtomicType; |
| import org.eclipse.wst.xml.xpath2.processor.internal.types.AnyType; |
| import org.eclipse.wst.xml.xpath2.processor.internal.types.CtrType; |
| import org.eclipse.wst.xml.xpath2.processor.internal.types.NumericType; |
| import org.eclipse.wst.xml.xpath2.processor.internal.types.QName; |
| import org.eclipse.wst.xml.xpath2.processor.internal.types.XSDouble; |
| import org.eclipse.wst.xml.xpath2.processor.internal.types.XSString; |
| import org.eclipse.wst.xml.xpath2.processor.internal.types.XSUntypedAtomic; |
| |
| /** |
| * Function to convert a sequence of items to a sequence of atomic values. |
| */ |
| public class FsConvertOperand extends Function { |
| |
| public FsConvertOperand() { |
| super(new QName("convert-operand"), 2); |
| } |
| |
| /** |
| * Evaluate arguments. |
| * |
| * @param args |
| * argument expressions. |
| * @throws DynamicError |
| * Dynamic error. |
| * @return Result of evaluation. |
| */ |
| public ResultSequence evaluate(Collection args, org.eclipse.wst.xml.xpath2.api.EvaluationContext ec) throws DynamicError { |
| return convert_operand(args); |
| } |
| |
| /** |
| * Convert-Operand operation. |
| * |
| * @param args |
| * Result from the expressions evaluation. |
| * @throws DynamicError |
| * Dynamic error. |
| * @return Result of fs: operation. |
| */ |
| public static ResultSequence convert_operand(Collection args) |
| throws DynamicError { |
| |
| assert args.size() == 2; |
| |
| Iterator iter = args.iterator(); |
| |
| ResultSequence actual = (ResultSequence) iter.next(); |
| ResultSequence expected = (ResultSequence) iter.next(); |
| |
| if (expected.size() != 1) |
| DynamicError.throw_type_error(); |
| |
| Item at = expected.first(); |
| |
| if (!(at instanceof AnyAtomicType)) |
| DynamicError.throw_type_error(); |
| |
| AnyAtomicType exp_aat = (AnyAtomicType) at; |
| |
| ResultBuffer result = new ResultBuffer(); |
| |
| // 1 |
| if (actual.empty()) |
| return result.getSequence(); |
| |
| // convert sequence |
| for (Iterator i = actual.iterator(); i.hasNext();) { |
| AnyType item = (AnyType) i.next(); |
| |
| // 2 |
| if (item instanceof XSUntypedAtomic) { |
| // a |
| if (exp_aat instanceof XSUntypedAtomic) |
| result.add(new XSString(item.getStringValue())); |
| // b |
| else if (exp_aat instanceof NumericType) |
| result.add(new XSDouble(item.getStringValue())); |
| // c |
| else { |
| assert exp_aat instanceof CtrType; |
| CtrType cons = (CtrType) exp_aat; |
| result.concat(cons.constructor(new XSString(item.getStringValue()))); |
| } |
| } |
| // 4 |
| else |
| result.add(item); |
| |
| } |
| |
| return result.getSequence(); |
| } |
| } |